On the prevention of a possible collision of asteroid Apophis with the Earth |
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Authors: | V V Ivashkin C A Stikhno |
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Institution: | 1.Keldysh Institute of Applied Mathematics,Russian Academy of Sciences,Moscow,Russia;2.Lavochkin Science and Production Association,Khimki, Moscow region,Russia |
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Abstract: | Currently, there is some positive probability of a collision of the asteroid Apophis with the Earth in 2036. In this study,
the problem of preventing the collision by correcting the asteroid’s orbit is examined. The characteristics of the impulsive
correction are investigated, as well as the ways of its implementation by kinetic and nuclear impacts. Impulsive and weak
effects are compared. Weak effects leading to slow changes in the asteroid’s orbit are considered to be more usable because
of the potentially higher accuracy of this correction. The characteristics of the gravitational effect of the asteroid by
a special spacecraft (SC) kept by its control jet engines at a certain point near the asteroid and gravitationally perturbing
the motion of Apophis are analyzed. The change in the perigee radius of the Apophis orbit in 2036 and the SC mass consumption
are examined as functions of the effect duration, the SC mass, its distance to the asteroid, the start time of the correction,
and the velocity of the SC engine exhaust jet. |
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